Knot-cutting machine.



C. M. GREISING & W. E; NAYLOR.

KNOT CUTTING MACHINE.

APPLICATION FILED OCT. 24, 1913.

1 1 85,790. Patented June 6, 1916.

2 SHEETS-SHEET I.

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C. M. GREISING & W. E. NAYLOR.

KNOT CUTTING MACHINE. APPLICATION mgn on. 24. 1913.

Patented June 6, 1916.

2 SHEETSSHEET 2.

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flagyza UNITED STATES PATENT OFFICE.

CHARLES M. GREISING AND WALTER E. NAYLOR, OF ST. PAUL, MINNESOTA,ASSIGNORS TO ST. PAUL TWINE COMPANY, A CORPORATION OF MINNESOTA.

KNOT-CUTTING- MACHINE.

Specification of Letters Patent. t t June 191 Application filed October24, 1913. Serial No. 797,012.,

To all whom it may concern: 7

Be it known that we, CHARLES M. GREis- ING and WALTER E. NAYLOR,citizens of the United States, and residents, respectively, of St. Paul,in the county of Ramsey and State of Minnesota, have invented certainnew and useful Improvements in Knot-Cutting Machines, of which thefollowing is a full, clear, and exact specification.

This invention relates to cutting machines, and more particularly tomachines for cutting twine knots.

The fiber out of which twine is made is delivered to twine mills inlarge bales. Some of the fiber in such bales is found, in manyinstances, to be considerably knotted. Again, fiber of knotted twine,when freed from the knots, can be used in making new twine. It has beenfound that a great amount of fiber can be saved by cutting the knotsof-knotted portions and utilizing all parts of the fiber, whether or notsuch fiber has been spun into twine previously.

Heretofore all knotshave been cut by hand. This method is not the mostdesirable for various reasons, including excessive cost of doing thework.

The objects of this invention, therefore, are to minimize the cost ofcutting twine knots and to provide a machine which is particularlyadapted for cutting such knots automatically.

The invention is illustrated on the accompanying sheets of drawings, inwhich Figure 1 is a side elevation of our knotcutting machine; Fig. 2 isa plan view of '29 and provided with springs in exactly the same; Fig. 3is a sectional view taken'in the plane of line 33 of Fig.2; and Fig. 4is a transverse sectional view of the ma chine taken substantially inthe planes of the irregular line 44 of Fig. 2.

The various novel features of our invention will be apparent from thedescription and drawings, and will be particularly set.

forth in the appended claims.

This knot-cutting machine includes a main base 10, supported upon legs11, the base being provided with bearing portions in which shafts 12,13, 14 and 15 are journaled. Mounted upon shaft 14,-which is the driveshaft of the machine, are two pulleys, a tight pulley 16 and a loosepulley 17 which may receive motion from any suit- .ing two sets ofadjacent rolls between which the twine, fiber or material to be cut isdrawn from the rotating cutter and discharged from the machine proper.These rolls 24 and 25 'are mounted respectively upon shafts 24 and 25which are mounted in slidable bearings 26 adapted to move up and down inslotted portions 27 of a frame, including side members 28 and 29 whichare secured to the base 10. Each of the bearing members 26 has a stem30, around which is wound a coiled spring 31, which engages the bearingmember 26, the other end of the spring being held in a predeterminedadjusted-position by a set screw 32 having an adjustable member 32thereon. By means of this yieldable arrangement the rolls 24 and 25 canmove upwardly against the tension of the springs 31 when materialpassing between the sets of rolls is of sulficient thickness to causesuch movement.

Cooperating with the cutting member 18 4 is a Babbitt metal roll 33which'is pressed into and maintained in yieldable engagement with saidcutting member, said roll 33 beingmounted in frame members 28 and thesame manner as hereinbefore considered with respectto the rolls 24 and25.

Mounted upon the shaft 15 is a corrugated roll 34, which cooperates withanother corrugated roll 35 mounted upon a shaft 36 'journaled in theside frame members 28 and 29. These corrugated rolls, which are therolls for drawing the twine or fiber into the machine at a uniform rateand feeding the same in a like manner to the cutting member 18, are alsoyieldably mounted-with respect to each other as hereinabove considered.v

It is seen, therefore, that there is a cutting member 18 and cooperatingsoft metal roll 33 for cutting fiber knots, a pair of corrugated rolls34 and 35 for feeding the twine or fiber to and between the cuttingmember 18 and roll 33, and two sets of plain rolls for drawing suchtwine or fiber from the cutting member and discharging same from themachine.

Motion is transmitted to the cutting member and the various rolls by thefollowing mechanism: Mounted upon the shaft 14 is a gear 37 meshing witha gear 38, which, in turn, meshes with a gear 39 mounted upon shaft 15.Mounted upon the opposite end of shaft 15 is another gear 40, whichmeshes with an'intermediate gear '41 meshing with a second intermediategear 42, which meshes with two gears 43 and 44 for transmitting motionto rolls 33 and 35 respectively. Also meshing with gear 37 is a gear 45,which drives a gear 46 mounted upon shaft 13, for actuating roll 23,cooperating roll 25 being driven through gears 47 and 48, the formermeshing with gear 43 and the latter being mounted to rotate roller 25. Agear 50, which meshes with gear 46, drives roll 22 through itsconnection with a gear 51 mounted upon one end of shaft 12. Roll 24 isactuated through a train of'gears including gears 53, 54 and 55, thefirst of which meshes with gear 46 and the second of which 'meshes withgears 53 and 55, the last gear being mounted concentric and rigid withroll 24. These various intermediate gears are suitably supported onstuds secured in the base member 10 and side frame members 28 and 29.All of the gears in this machine are provided with the proper number ofteeth so that the corrugated in-feeding rolls 34 and 35 are given arelatively slow movement, the cutting member 18 and its cooperating roll33 a relatively faster speed, cooperating rolls 23 and 25 a speed somewhat slower than the speed of the cutting member but faster than thespeed of the feed rolls 34and 35, and rolls22 and 24 a speed somewhatgreater than the speed ofrolls 23 and 25. Cooperating discharging rolls22 and 24 are given greater speed than cotiperating discharging rolls 23and25- for the purpose of jerking apart or separating the cut portionsof the fiber or twine as soon as cooperating rolls 22 and 24 take holdof the material. The speed of rolls 23 and 25 is greater than speed ofrolls 34.and 35 so that there will be a drawing action therebetween, andat the same time the cutting member will rotate at the highest speed forcutting knots.

By means of this machine fiber and twine knots may be quickly cut andthe portions of such fiber or twine separated in a minimum amount oftime at a relatively low cost. Many pieces of twine may be fed into themachine simultaneously, the knots cut and the .cut portions separatedfrom each other, the whole operation being automatic.

ber.

4. A knot-cutting machine having, in com- Due to the yieldablerelationship of the 00- operating feed rolls and the cutting member andits cotiperating roll, twines and knots of varying sizes may be fedthrough the machine and cut. i E" .7

There may be various modifications of the precise form of the invention.as herein disclosed, and it is our intention to cover all suchmodifications which do not involve a departure from the spirit and scopeof our invention. as set. forth in the following claims.

l/Vhat we claim as new is:

1. A knot cutting machine having a. cutting member including a series ofspaced cutting disks, and a yieldably mounted cooperating roll adj acentsaid cutting disks.

2. A knot cutting machine having a cutting member including a series ofspaced cutting disks, and a coiiperating yieldably mounted roll normallyin .engagement with said cutting disks.

3. A knot-cutting machine having, in combination, a plurality of sets ofrolls and a cutting member, one of said sets of rolls operating at agreater speed than another of said set of rolls for separating outportions of material fed past said cutting membination, cutting meansincluding revolving disks and a roll cooperating therewith, meansforfeeding material into contact with said cutting means, and means forseparating the cut portions of said material after passing from saidcutting means.

5. A knot-cutting machine having, in combination, a plurality ofcotiperating rolls for feeding material to be cut into and drawing suchmaterial out of the machine, 3.?

and a revolving cutting member interposed between said rolls, the speedof said rolls ting member, corrugated rolls for feeding 3 such materialto said cutting member, and plain rolls for drawing such material awayfrom said cutting member.

7. A knot-cutting machine having, in combination, a cutting member, ayieldably mounted member for holding material to be cut in engagementwith said cutting member, means for feeding such material to saidcutting member, and a plurality of sets of rolls rotating. at differentspeeds for idrawing such material away from said cuttlng member anderking apart cut portions of such material. 7

8. A knot-cuttmg machine having, in comblnatlon, a rotary cuttingmember, feed rolls on one side of said cutting member ro- In testimonywhereof we affix our signatating at a relatively low speed for feedingtures, in the presence of two witnesses.

twine to said cutting member and discharging rolls on the other side (ifsaid cutting member rotating at a higher speed to draw Witnesses:

twine from said feed rolls past said cutting member, said cutting memberrotating at a WILLIAM H. PIPER, still higher speed. SIGARD J. OLBERG.

copies of this patent may be obtained for five cents each, by sunningthe Gonniniener of latex.

Washington. D. 0." i r

